ΔE 8.8, close: similar, with a visible difference side by side. German Camo Green is a little lighter than Fern Green.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). German Camo Green is a little lighter than Fern Green.
The same difference applies the other way round: Fern Green is a little darker.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Fern Green on the colour wheel See German Camo Green on the colour wheel
All matches: Fern Green equivalents · German Camo Green equivalents